Comparison of sensitivity and resolution load sensor at various configuration polymer optical fiber

Abstract

This study uses a load sensor with a macro-bending on polymer optical fiber loop model which is placed between two plates with a buffer spring. The load sensor with light intensity modulation principle is an infrared LED emits light through the polymer optical fiber then received by the phototransistor and amplifier. Output voltage from the amplifier continued to arduino sequence and displayed on the computer. Load augment on the sensor resulted in an increase of curvature on polymer optical fibers that can cause power losses gets bigger too. This matter will result in the intensity of light that received by phototransistor getting smaller, so that the output voltage that ligable on computer will be getting smaller too. The sensitivity and resolution load sensors analyzed based on configuration with various amount of loops, imperfection on the jacket, and imperfection at the cladding and core of polymer optical fiber. The results showed that the augment on the amount of load, imperfection on the jacket and imperfection on the sheath and core polymer optical fiber can improve the sensitivity and resolution of the load sensor. The best sensors resolution obtained on the number of loops 4 with imperfection 8 on the core and cladding polymer optical fiber that is 0.037 V/N and 0,026 N. The advantages of the load sensor based on polymers optical fiber are easy to make, low cost and simple to use measurement methods.

Karakterisasi Sensor Kekentalan Oli Berbasis Serat Optik Plastik Menggunakan Metode Back Scattering

“…Banyak penelitian telah dilakukan menggunakan serat optik sebagai sistem sensor dalam upaya untuk pengembangannya. Sebagai contoh penelitian pengukuran tingkat konsentrasi larutan [4], sensor pergeseran berdasarkan metode pencacatan (imperfection) pada struktur serat optik [2], kekeruhan air [5], suhu [6], mendeteksi radiasi UV [7], pembuatan sensor beban dengan menggunakan metode lekukan kecil (microbending) pada serat optik dengan jarak tertentu [8], pemanfaatan serat optik plastik sebagai media pendeteksi terhadap perubahan beban [9], dan masih banyak lagi penelitian lain menggunakan serat optik. Sejauh ini, sensor serat optik telah dikembangkan dan diaplikasikan sebagai sensor kekentalan oli berbasis perubahan temperatur pada perancangan sistem sensor serat optik ekstrinsik [10].…”

“…Selanjutnya data yang diperoleh dari hasil pengujian digunakan untuk menganalisis karakteristik sensor yang meliputi perhitungan nilai range daya keluaran, sensitivitas, dan resolusinya. Nilai range daya keluaran untuk sensor tersebut ditentukan dengan menggunakan persamaan berikut [9] [11]:…”

“…Sensitivitas sensor adalah pengukuran untuk mengetahui seberapa besar kepekaan sensor terhadap besaran suatu larutan yang di ukur. Sensitivitas sensor kekentalan dapat diukur dengan menggunakan persamaan berikut [9,11]:…”

“…Selanjutnya menghitung resolusi sensor untuk mengetahui nilai besaran terkecil yang dapat di ukur oleh sensor kekentalan. Resolusi sensor kekentalan dapat diukur dengan menggunakan persamaan berikut [9,11]:…”

Polymer Optical Fiber-Based Respiratory Sensors: Various Designs and Implementations

“…Several methods of measuring the respiratory rate using sensor systems have been developed, particularly using optical fiber [4]. The optical fiber can be applied as multipurpose sensors in various measurement fields with several advantages in terms of sensitivity, selectivity, reversibility, flexibility, accuracy, smaller size, and lightweight [5].…”